Stave wooden pipe.



No. 785,423. Y PATENTED MAR. 2l, 1905.

J. HOPKIRK.

STAVE WOODEN PIPE.

- APPLIUATION FILED SEPT. 28, 1904.

' NTTED STATES Patented March 21, -1905.

JAMES HOPKIRK, OF SEATTLE, VASHINGTON.

STAVE WOODEN PIPE.

SPECIFICATION forming part of Letters Patent No. 785,423, dated March21, 1905.

Application filed September 28, 1904 Serial No. 226,408.

To (1,7/7/ 'wb/0711, it pta/y concern:

Be it known that LJAMES HoPKiRK, a citizen of the United States,residing at Seattle, in the county of King and State of Washington, haveinvented certain new and useful vImprovements in Stave Wooden Pipes; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to improvements in sectional tubing, and moreparticularly to Ystave wooden pipes.

rl`he object of the invention is to improve the construction of a tubingwhich is to be used where earth is to be carried in water for somedistance through piping in hydraulic grading.

A further object of the invention is to construct a pipe or tubing whichis provided with a reinforcing wearing-surface.

A still further object of the invention is to improve the constructionof a sectional pip ing or tubing which is provided with a removableauxiliary section for the purpose of increasing the thickness of aportion of the tubing. f

i ith these and other objects in View the invention consists in certainnovel constructions, combinations, and arrangements of parts, as will behereinafter fully described, illustrated in the accompanyingdrawings,and more particularly pointed out in the claims hereto appended.

ln the drawings, Figure l is a transverse sectional view of a tubing orpiping constructed in accordance with the present invention. Fig. 2 is afragmentary plan view of a tubing taken on line A A, Fig'. l.

ln the employment of stave wooden pipes, which are known to the patentedart, for the purpose of transferring earth in water through piping inhydraulic grading it has been found that the sand, gravel, and earthwhich is passed through the piping wears away a portion thereof in ashort time, and thereby materially increasing expense involved in usingthe ordinary pipe or tube. To obviate this difficulty, I have produced atubing or piping which comprises a plurality of sections, one

of which forms a reinforced portion for the tubing.

Referring to the drawings by numerals, l designates a plurality ofsegmental sections or strips which are preferably of the sameconstruction. Said strips or sections 1 are secured together with theother sections 2, 2, and 3, which are employed in the construction of acompleted pipe or tube. rlhe sections or strips 2 2 are of the samewidth at their upper edge 4t as the contiguous edge of the engaging'sections or strips 1. The lower longitudinal edge of sections 2 2 areincreased in thickness to approximately twice that of their upper edgesA LL. Vilhen the lower or bottom sections l are secured in position withthe other sections 2, 2, and 1, as is illustrated in the drawings, Fig.1, there will be provided between the edges 5 5 of the sections 2 2aspace within which there is adapted to be positioned yan auxiliary orreinforcing strip or section 3.

It will be apparent that the edges 5 5 provide a locking-surface againstwhich the edges of reinforcing strips 3 is adapted to engage, therebypositively securing the same in position with the other sections orstrips. The reinforcing-strips 3 are preferably blocks of wood cutacross the grain, so as to expose the end of the grain against which thesand, gravel, and earth is adapted to engage. lt will be obvious that byexposing the end of the grain so as to take the wear the durability ofthe tubing or piping is greatly increased over the construction of adevice which has the auxiliary or reinforcing strip or section 3 formedof a piece of material having the grain running approximatelylongitudinally thereof. It will be obvious that the space between theedges 5 of sections 2 2 which is filled by section or strip 3 may befilled by other means than that of a wooden strip or section.

The reinforced portion of the pipes which are constructed in accordancewith my invention obviate the unsatisfactory results obtained loy vusingan ordinary hollow tubing or piping for the purpose as heretoforespecified, and, furthermore, I produce by my construction a simpletubing or piping which is composed of a minimum number of parts andwhich is comparatively inexpensive in construction.

Upon referring to the drawings, Fig. l, it will be obvious that thereinforcing strip or section 3 is preferably of a greater thickness nearthe central portion thereof than at its edges, although, if it isdesired, the same thickness of said strip could be maintained throughoutits width. However, if this strip or filling means 3 should be of thesame diameter throughoutits entire width an undesirable result would beobtained-to wit, the construction of a hollow or concaved portion whichis not formed in the same arc of a circle as the inner surfaces 6 of thesections 2 2.

By diverging the sections 2 2 toward their lowest edge and theassembling with said sections of sections l, as shown in Fig. l, thesections 2 2 form a beveled side for the longitudinal groove which isformed by sections 1L and 2 and within which filling means is placed.

l/Vhile I have described in the foregoing description and illustrated inthe accompanying drawings the preferred construction of my invention, itwill be obvious that certain alterations, modifications, and changes maybe made, and I therefore reserve the right to make such alterations,modifications, and changes as shall fairly fall within the spirit andscope of the present invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. A device of the character described, comprising a plurality ofsections, some of said sections provided with inwardly-projectingportions and a removable section secured be-, tween the projectingportion of said sections to form a continuous wearing-section ofincreased thickness.

2. In a device of the character described, the combination of a casingprovided with extensions projecting from the sides thereof, andreinforcing means secured between said extensions to form awearing-section of increased thickness.

3. A device of the character described, coinprising a casing,longitudinal extensions projecting inwardly from the sides thereof, andfilling means secured longitudinally within said casing between saidprojections to form a wearing-section of increased thickness.

4. Adevice of the character described, comprisinga plurality ofsections,one section upon each side of greater width near its lower endthan the remaining sections, and filling means positioned between saidsections of greater width.

5. In a device of the character described, the combination of a tubularcasing, comprisinga plurality of sections, a section upon each sideprovided with a longitudinal extension, and a removable auxiliarysection positioned between the extended portion of said side sections toform a wearing-section of increased thickness.

6. A device of the character described, comprising a casing,a removablereinforcing member positioned in the bottom thereof, and beveledextensions formed upon the sides of said casing and positively retainingsaid reinforcing member in a fixed position therewith, said reinforcingmember and the extensions extending throughout the length of the casingto form a wearing-section.

In testimony whereof I hereunto aliix my signature in presence of twowitnesses.

JAMES HOPKIRK.

Witnesses:

L. T. TURNER, LUCIE E. STEVENS.

